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Repurchase Agreement Borrowings (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 171,799 | $ 213,786
Available unpledged securities | 1,263,000 | 1,225,000
Short-term borrowings | 171,799 | 238,786
Securities Sold under Agreements to Repurchase |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Short-term borrowings | 216,600 | 334,900
Maturity Overnight [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 171,799 | 213,786
Maturity up to 30 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 0 | 0
Maturity 30 to 90 Days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 0 | 0
Maturity over 90 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 0 | $ 0

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